---
product_id: 3067453
title: "HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy"
brand: "hm digital"
price: "R423"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Hm Digital"
url: https://www.desertcart.co.za/products/3067453-hm-digital-tds-3-handheld-tds-meter-with-carrying-case
store_origin: ZA
region: South Africa
---

# 0-9990 ppm range Built-in digital thermometer ±2% accuracy HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

**Brand:** hm digital
**Price:** R423
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of water quality—because pure water means pure performance!

## Quick Answers

- **What is this?** HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy by hm digital
- **How much does it cost?** R423 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/3067453-hm-digital-tds-3-handheld-tds-meter-with-carrying-case)

## Best For

- hm digital enthusiasts

## Why This Product

- Trusted hm digital brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pro-Grade Accuracy:** Advanced microprocessor tech ensures ±2% readout accuracy you can trust every time.
- • **Smart Hold Function:** Lock your readings instantly for easy recording and stress-free monitoring.
- • **On-the-Go Convenience:** Comes with a rugged carrying case and belt clip—perfect for professionals in the field.
- • **Precision at Your Fingertips:** Instantly measure water purity with 1 ppm resolution for crystal-clear insights.
- • **All-in-One Water Quality Check:** Integrated digital thermometer complements TDS readings for comprehensive analysis.

## Overview

The HM Digital TDS-3 is a professional handheld meter designed to measure Total Dissolved Solids in water with a wide 0-9990 ppm range and 1 ppm resolution. Featuring ±2% accuracy and a built-in digital thermometer, it delivers reliable, instant readings on a large LCD screen. Its durable carrying case with belt clip and hold function make it ideal for commercial, hydroponic, and industrial water quality monitoring.

## Description

Product Description Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS-3 can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, with 0 ppm being pure H2O. The TDS-3 is great for checking your tap water quality, or knowing when to change a filter. (The meter does not test for biological contaminants.) The TDS-3 is a great tool for drinking water, water filtration and purification, colloidal silver, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, commercial and industrial applications and more. The TDS-3 is a rugged model that includes a protective carrying case. This is the world's most popular handheld TDS meter for industry professionals. From the Manufacturer Ideal for commercial use.

Review: It works, seems to be accurate, and is low cost - I tested this with my tap water and filtered water from the fridge. It comes calibrated from the factory, but not sure how long the calibration will last. The measurements were easy to read and matched the report from our water company when testing tap water, and it correctly reported that the hardness value was lower when testing filtered water, so it seems this device works well. I'm happy with it and glad I got it, especially for the low price.
Review: Great TDS Meter for Hydroponics – Easy to Use & Accurate! - I’ve been using the HM Digital TDS-3 for my hydroponic system, and it’s been a game-changer. If you’re serious about growing healthy plants, keeping track of your nutrient levels is crucial, and this little device makes it incredibly easy. What I Like: ✅ Accurate & Reliable – The readings are consistent, and the 0–9990 ppm range covers all my needs. I can easily check if my nutrient solution is too strong or too weak. ✅ Temperature Compensation (ATC) – I don’t have to worry about temperature affecting the accuracy. The meter adjusts automatically. ✅ Super Easy to Use – Just dip it in, wait a couple of seconds, and get an instant reading. The hold function is great for locking the number so I can check after pulling my hand out of my reservoir. ✅ Compact & Battery-Saving – It’s small, comes with a protective case, and has an auto shut-off to save battery life. A Couple of Things to Keep in Mind: ❌ Not Waterproof – Be careful not to drop it in water. I make sure only the probes are submerged. ❌ Doesn’t Measure pH – This is strictly for TDS and temperature, so you’ll need a separate pH meter. Final Thoughts: For the price, this TDS meter is absolutely worth it. It gives me quick, accurate readings and helps me dial in the perfect nutrient levels for my plants. If you’re into hydroponics, aquaponics, or even just checking your water quality, I highly recommend it!

## Features

- plastic
- Imported
- Its Ideal for Commercial Use
- Its Includes a Carrying Case with Belt Clip
- Hold Function: Saves Measurements for Convenient Reading and Recording
- Highly Efficient and Accurate Due to Its Advanced Microprocessor Technology
- Built-in Digital Thermometer, Display: Large and Easy-to-read LCD Screen.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000VTQM70 |
| Age Range (Description) | Adult |
| Average Battery Life | 3 Hours |
| Batteries | 2 LR44 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #5,262 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Conductivity Meters & Accessories |
| Brand | HM Digital |
| Color | Style 1 |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,697) |
| Date First Available | March 2, 2007 |
| Display Type | LCD |
| Global Trade Identification Number | 00826333000001 |
| Included Components | Carrying case |
| Indoor/Outdoor Usage | Indoor |
| Is Discontinued By Manufacturer | No |
| Item Length | 1 Inches |
| Item Package Quantity | 1 |
| Item Weight | 0.007 ounces |
| Item model number | TDS-3 |
| Manufacturer | HM Digital |
| Measurement Accuracy | 1 |
| Model Name | TDS-3 |
| Number Of Pieces | 10 |
| Number of Batteries | 2 LR44 batteries required. (included) |
| Outer Material | Metal |
| Part Number | TDS-3 |
| Pattern | meter |
| Power Source | Battery Powered |
| Product Care Instructions | Wipe Clean |
| Reusability | Single Use |
| Size | 0 - 9990 ppm. TDS Range, 1 ppm Resolution, +/- 3% Readout Accuracy |
| Special Feature | High Accuracy |
| Special Features | High Accuracy |
| Style | Contemporary |
| Temperature Range | 0/80 Degrees Celsius |
| UPC | 891144000083 826333000001 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** HM Digital
- **Color:** Style 1
- **Display Type:** LCD
- **Included Components:** Carrying case
- **Outer Material:** Metal
- **Power Source:** Battery Powered
- **Product Care Instructions:** Wipe Clean
- **Special Feature:** High Accuracy
- **Unit Count:** 1.0 Count

## Images

![HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - Image 1](https://m.media-amazon.com/images/I/512msUopWxL.jpg)

## Questions & Answers

**Q: Does this TDS compensate for differences in temperature like the HM Digital TDS-4?**
A: Yes if it was a real HM TDS meter but it is not.  It's a knock off.  Go to manufacturer's webpage and find a dealer in your area and order it there if you want a real meter.  
I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT.  The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate.  The knock-off simply has a hole and no printed words about calibration on it.  The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not.  Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

**Q: Where is this item made?**
A: This is a a knock-off.  I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT.  The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate.  The knock-off simply has a hole and no printed words about calibration on it.  The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not.  Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

**Q: Does this teat for lead , mercury, cadmium and other metals? If so, does it tell you concentrations?**
A: No, it does not test for any specific dissolved solid. It tells you the purity of the water only. In other words, how close is the water sample is to distilled water.

**Q: The one I bought seems to work however it has no way to adjust it there is a hole in the back but no screw is it a imposter?**
A: That's because it's a knock-off.  I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT.  The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate.  The knock-off simply has a hole and no printed words about calibration on it.  The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not.  Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works, seems to be accurate, and is low cost
*by K***Z on December 3, 2025*

I tested this with my tap water and filtered water from the fridge. It comes calibrated from the factory, but not sure how long the calibration will last. The measurements were easy to read and matched the report from our water company when testing tap water, and it correctly reported that the hardness value was lower when testing filtered water, so it seems this device works well. I'm happy with it and glad I got it, especially for the low price.

### ⭐⭐⭐⭐⭐ Great TDS Meter for Hydroponics – Easy to Use & Accurate!
*by M***E on March 5, 2025*

I’ve been using the HM Digital TDS-3 for my hydroponic system, and it’s been a game-changer. If you’re serious about growing healthy plants, keeping track of your nutrient levels is crucial, and this little device makes it incredibly easy. What I Like: ✅ Accurate & Reliable – The readings are consistent, and the 0–9990 ppm range covers all my needs. I can easily check if my nutrient solution is too strong or too weak. ✅ Temperature Compensation (ATC) – I don’t have to worry about temperature affecting the accuracy. The meter adjusts automatically. ✅ Super Easy to Use – Just dip it in, wait a couple of seconds, and get an instant reading. The hold function is great for locking the number so I can check after pulling my hand out of my reservoir. ✅ Compact & Battery-Saving – It’s small, comes with a protective case, and has an auto shut-off to save battery life. A Couple of Things to Keep in Mind: ❌ Not Waterproof – Be careful not to drop it in water. I make sure only the probes are submerged. ❌ Doesn’t Measure pH – This is strictly for TDS and temperature, so you’ll need a separate pH meter. Final Thoughts: For the price, this TDS meter is absolutely worth it. It gives me quick, accurate readings and helps me dial in the perfect nutrient levels for my plants. If you’re into hydroponics, aquaponics, or even just checking your water quality, I highly recommend it!

### ⭐⭐⭐⭐⭐ Test your water
*by M***G on December 28, 2025*

Works well on my boat

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-01*